OpenAI is reportedly testing a new ChatGPT feature which will mirror functionalities present in Anthropic’s Claude AI.
ChatGPT currently supports GPTs, which are prompt-engineered to specific user requirements. In contrast, Claude Skills are folder-based instructions that train the AI in particular abilities, workflows, and domain knowledge.
Anthropic states that Claude’s Skills are composable, allowing them to stack and be coordinated automatically by the AI. They are portable, maintaining a consistent format across Claude applications, Claude Code, and the API. Skills are efficient, loading only necessary components on demand, and powerful, capable of including executable code for tasks where traditional programming offers greater reliability than token generation. An example is a frontend design skill plugin, which enhances Claude’s understanding of interfaces during web application development.
OpenAI’s version, also expected to be named Skills and internally codenamed “hazelnuts,” will be accessible via slash commands, according to an observation on X by Tibor. The feature includes a Skills editor and an option to convert an existing custom GPT into a Skill.
Skills are also coming to ChatGPT (codename "hazelnuts"), available as slash commands, including a Skills editor and an option to convert a custom GPT into a skill https://t.co/WeVgxfyuOq
— Tibor Blaho (@btibor91) December 20, 2025
While a rollout timeline remains unconfirmed, a January 2026 release is anticipated.
